Mitsubishi WT-46807, WS-73907, WS-65857, WS-65807, WS-55907 User Manual

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MITSUBISHI ELECTRIC

ManualManual

Manual

ManualManual

PROJECTION TELEVISION
V17 / V17+ / V17++ CHASSIS

V17

MODELS

WT-46807
WS-55807
WS-65807

WS-73907

CAUTION:

Before servicing this chassis, it is important that the service person read the "SAFETY PRECAUTIONS" and
"PRODUCT SAFETY NOTICE" contained in this manual.

SPECIFICATIONS

• Power : AC 120V, 60Hz, 320W

• Frequency : VHF 54 ~ 470MHz
Range UHF 470 ~ 806MHz

• Antenna Input : VHF/UHF 75Ω unbalanced

Single axis input

• CRT Size : [WT-46807 / WS-55807 / WS-65807

WS-55857 / WS-65857 / WS-55907
WS-65907] 7 inches [WS-73907] 9 inches

• High Voltage : 32.0kV (at 0A)

• Speaker : [WT-46807 / WS-55807 / WS-65807

WS-55857 / WS-65857]
5" round type, full range 2 pcs. (8Ω 10W)

: [WS-55907 / WS-65907 / WS-73907]

5" round type, full range 2 pcs. (8Ω 10W)
2" round type, tweeter 2 pcs. (8Ω 10W)

• Weight : [WT-46807] 121 lbs

: [WS-55807] 250 lbs
: [WS-65807] 323 lbs
: [WS-55857] 243.5 lbs
: [WS-65857] 321.5 lbs
: [WS-55907] 256 lbs
: [WS-65907] 348 lbs
: [WS-73907] 405 lbs

• Weight and dimensions shown are approximate.

• Design specifications are subject to change without notice.

• Cabinet : [Model] (H)x(W)x(D)
Dimensions : [WT-46807] 37.4"x41.6"x28"

• Input Level : VIDEO IN JACK (RCA Type)

• Output Level : VIDEO OUT JACK (RCA Type)

V17+

MODELS

WS-55857
WS-65857

: [WS-55807] 51.6"x50.6"x28.3"
: [WS-65807] 61.8"x58.7"x27.5"
: [WS-55857] 51.9"x50.7"x28.2"
: [WS-65857] 61.9"x59"x28.2"
: [WS-55907] 51.5"x49.9"x28.1"
: [WS-65907] 61.6"x58.2"x28.2"
: [WS-73907] 65.7"x64.3"x29.8"

1.0Vp-p 75Ω unbalanced
: AUDIO IN JACK (RCA Type)

-4.7dBm 43kΩ unbalanced
: S-VIDEO IN JACK

(Y/C separate type)
Y:1.0 Vp-p C:0.286Vp-p(BURST)
75Ω unbalanced

: DVD / Y, Cr, Cb (RCA Type)

Y: 1.0 Vp-p Cr, Cb: 700mVp-p

: ATV / Y(G), Pr(R), Pb(B), H, V

Y: 1.0Vp-p with sync 75Ω (BNC)
Pr, Pb: 700mV 75Ω
H, V: 3.0Vp-p 75Ω

1.0Vp-p 75Ω unbalanced

: AUDIO OUT JACK (RCA Type)

-4.7dBm 4.7kΩ unbalanced

V17++

MODELS

WS-55907
WS-65907
WS-73907

MITSUBISHI DIGITAL ELECTRONICS AMERICA, INC.

9351 Jeronimo Road, Irvine, CA 92618-1904

Copyright © 2000 Mitsubishi Digital Electronics America, Inc.

All Rights Reserved

MODELS: WT-46807 / WS-55807 / WS-55857 / WS-55907 / WS-65807 / WS-65857 / WS-65907 / WS-73907

CONTENTS

INTRODUCTION ............................................................................................................................... 5

PRODUCT SAFETY NOTICE ...........................................................................................................5

SAFETY PRECAUTIONS .................................................................................................................6

DISASSEMBLY
Cabinet Disassembly (Front View)

WT-46807 ...................................................................................................................................... 7

WS-55807 / WS-65807 .................................................................................................................. 8

WS-55857 / WS-65857 .................................................................................................................. 9

WS-55907 / WS-65907 / WS-73907 ............................................................................................ 10

Cabinet Disassembly (Rear View)

WT-46807 .................................................................................................................................... 11

WS-55807 / WS-55857 / WS-55907 / WS-65807 / WS-65857 /

WS-65907 / WS-73907 ................................................................................................................ 12

Cabinet Separation Procedure WS-65807 / WS-65857 / WS-65907 / WS-73907 ....................... 13

SERVICING THE LENTICULAR SCREEN AND FRESNEL LENS

Lenticular Screen and Fresnel Lens Removal

WS-55807 / WS-65807 ....................................................................................................... 14

WS-55857 / WS-55907 / WS-65857 / WS-65907 / WS-73907 / WT-46807 ...................... 15

Lenticular Screen and Fresnel Lens Installation .................................................................... 16

SERVICING THE DIAMONDSHIELD

TM

r

DiamondShieldTM Removal / Installation ...................................................................................... 17

SERVICING PCBs

PCB Locations and Chassis Removal ......................................................................................... 18

Main Component Locations ......................................................................................................... 18

CRT REPLACEMENT

CRT Removal .............................................................................................................................. 19

CRT Installation ........................................................................................................................... 20

ELECTRICAL ADJUSTMENTS

Test Equipment ............................................................................................................................ 22

Initial Setup .................................................................................................................................. 22

Self Diagnostics ........................................................................................................................... 24

Circuit Adjustment Mode .............................................................................................................. 24

Convergence Adjustment Mode ................................................................................................... 26

E2PROM Replacement................................................................................................................ 28

Adjustment Items List .................................................................................................................. 28

Adjustment Test Points ................................................................................................................ 31

Adjustment Procedures ................................................................................................................ 32

Audio Circuit ....................................................................................................................... 32

High Voltage Regulation ..................................................................................................... 33

Main/Sub Y Level................................................................................................................33

Side by Side Sub Picture Tint ............................................................................................. 34

Side by Side Sub Picture Color .......................................................................................... 34

CRT Cutoff .......................................................................................................................... 35

White Balance (NTSC) ....................................................................................................... 35

White Balance (HD) ............................................................................................................ 36

Cb, Cr Offset ....................................................................................................................... 36

Black Level ......................................................................................................................... 37

Page 3

MODELS: WT-46807 / WS-55807 / WS-55857 / WS-55907 / WS-65807 / WS-65857 / WS-65907 / WS-73907

Sub Contrast ....................................................................................................................... 37

Dynamic Focus Preset ........................................................................................................ 38

Electrostatic Focus.............................................................................................................. 38

Lens Focus.......................................................................................................................... 39

Character Position ..............................................................................................................39

Deflection/Convergence Geometry Presets........................................................................ 40

Deflection Circuit Geometry Adjustments ........................................................................... 41

Convergence Circuit Geometry Adjustments ...................................................................... 42

Centering and Static Convergence ..................................................................................... 43

Coarse Convergence Adjustments ..................................................................................... 44

Fine Convergence Adjustments .......................................................................................... 45

CHIP PARTS REPLACEMENT ....................................................................................................... 46

REPLACEMENT PARTS

Parts Ordering.............................................................................................................................. 47

Critical and Warranty Parts Designation ...................................................................................... 47

Parts Tolerance Codes ................................................................................................................. 47

Quick Reference List ................................................................................................................... 48

Service Parts List ......................................................................................................................... 49

CIRCUITRY BLOCK DIAGRAMS

Standby Supply Regulator ........................................................................................................... 66

Switched Supply Regulator .......................................................................................................... 67

Video / Color A/V Switch Circuit .................................................................................................. 68

Video / Color Signal Path ............................................................................................................. 69

Sync Signal Path ......................................................................................................................... 70

Deflection / HV ............................................................................................................................. 71

X-Ray Protect............................................................................................................................... 71

Sound Circuit ............................................................................................................................... 72

Convergence................................................................................................................................ 73

Control Circuit .............................................................................................................................. 74

Section 2 .... Schematic Diagrams

SCHEMATIC DIAGRAMS

Overall Block Diagram ................................................................................................................... 1

PCB-POWER................................................................................................................................. 2

PCB-MAIN ..................................................................................................................................... 3

PCB-SIGNAL (AV/I-O .................................................................................................................... 4

PCB-SIGNAL (MICRO) .................................................................................................................. 5

PCB-SIGNAL (VC/SW) .................................................................................................................. 6

PCB-2HDW (IN)............................................................................................................................. 7

PCB-2HDW (MAIN) ....................................................................................................................... 8

PCB-2HDW (OUT)......................................................................................................................... 9

PCB-TERMINAL .......................................................................................................................... 10

PCB-CONVERGENCE GENERATOR/JUNGLE .......................................................................... 11

PCB-3DYC/MAIN DECODER ...................................................................................................... 12

PCBs - CRT/CONTROL/PREAMP/DBF/FRONT/DISPLAY ......................................................... 13

PCB-BMP (1) ............................................................................................................................... 14

PCB-BMP (2) ............................................................................................................................... 15

PCB LAYOUT DIAGRAMS .............................................................................................................16

Page 4

MODELS: WT-46807 / WS-55807 / WS-55857 / WS-55907 /WS-65807 / WS-65857 / WS-65907 / WS-73907

INTRODUCTION

This service manual provides service instructions for PTV Models WT-46807, WS-55807 and WS-65807 which
use the V17 chassis, PTV Models WS-559857, and WS-65857 which use the V17+ chassis, and PTV Models
WS-55907, WS-65907 and WS-73907 which use the V17++ chassis. Service personnel should read this manual
thoroughly before servicing these chassis.

This service manual includes:

1. Assembly and disassembly instructions for the front and rear cabinet components.

2. Servicing of the Lenticular Screen and Fresnel Lens.

3. Servicing printed circuit boards (PCBs).

4. CRT replacement procedure.

5. Electrical adjustments.

6. Chip parts replacement procedures.

7. Circuit path diagrams.

The parts list section of this service manual includes:

1. Cabinet and screen parts.

2. Electrical parts.

Schematic and block diagrams of the above listed models are included in this service manual for better under­standing of the circuitry. PCB drawings are also included for easy location of parts and test points.

PRODUCT SAFETY NOTICE

Many electrical and mechanical parts in television receivers have special safety related characteristics. These
characteristics are often not evident from visual inspection nor can the protection afforded by them necessarily be
obtained by using replacement components rated for higher voltage, wattage, etc.

Replacement parts which have special safety characteristics are identified in this service manual.

Electrical components having such features are identified by shading in the schematics and by bold type in
the parts list of this service manual. The replacement for any safety part should be identical in value and

characteristics.

Page 5

MODELS: WT-46807 / WS-55807 / WS-55857 / WS-55907 /WS-65807 / WS-65857 / WS-65907 / WS-73907

SAFETY PRECAUTIONS

NOTICE: Observe all cautions and safety related notes located inside the receiver cabinet and on the

receiver chassis.

WARNING:

1. Operation of this receiver outside the cabinet or with the cover removed presents a shock hazard
from the receiver's power supplies. Work on the receiver should not be attempted by anyone who is
not thoroughly familiar with the precautions necessary when working on high voltage equipment.

2. Do not install, remove or handle the picture tubes in any manner unless shatterproof goggles are
worn. People not so equipped should be kept away while the picture tube is being handled. Keep
the picture tube away from the body while handling.

3. When service is required, observe the original lead dress. Extra precaution should be taken to
assure correct lead dress in the high voltage area. Where a short-circuit has occurred, replace those
components that indicate evidence of overheating.

X-Radiation warning

The surface of the cathode ray tubes (CRTs) may generate X-Radiation, so take proper precautions when servic­ing. It is recommended that a lead apron be used for shielding while handling the CRT. Use this method if
possible.

When replacing the CRTs, use only the designated replacement part since it is a critical component with regard to
X-Radiation. High voltage must be set as prescribed under the section titled Electrical Adjustments.

Leakage current check

Before returning the receiver to the customer, it is recommended that leakage current be measured according to
the following methods.

1. Cold Check

With the alternating current (AC) plug removed from the AC source, place a jumper across the two AC plug

prongs. Connect one lead of an ohm meter to the AC plug and touch the other lead to each exposed metal
part (i.e. antennas, handle bracket, metal cabinet, screw heads, metal overlay, control shafts, etc.), particu­larly any exposed metal part that has a return path to the chassis. The resistance of the exposed metal parts
having a return path to the chassis should be a minimum of 1Mega Ohm. Any resistance below this value
indicates an abnormal condition and requires corrective action.

2. Hot Check ...Use the circuit shown below to perform the hot check test.

1. Keep switch S1 open and connect the receiver to the measuring circuit. Immediately after

connection, and with the switching devices of the receiver in their operating positions, measure
the leakage current for both positions of switch S2.

2. Close switch S1, energizing the receiver. Immediately after closing switch S1, and with the

switching devices of the receiver in their operating positions, measure the leakage current for both
positions of switch S2. Repeat the current measurements of items 1 and 2 after the receiver has
reached thermal stabilization. The leakage current must not exceed 0.5 milliampere (mA).

Page 6

MODELS: WT-46807 / WS-55807 / WS-55857 / WS-55907 /WS-65807 / WS-65857 / WS-65907 / WS-73907

CABINET DISASSEMBLY (FRONT VIEW)

WT-46807

*Refer to the Parts List for Part Numbers

1a. Front Cabinet Disassembly

1. Remove the Speaker Grille by pulling forward.

2. Remove 2 screws (b) to remove the Control Panel.

3. Remove the Board Front by removing 4 screws (a).

4. Remove the 4 screws (c) holding the Screen Assembly.

5. Lift the Screen Assembly up and away from the cabinet.

Page 7

MODELS: WT-46807 / WS-55807 / WS-55857 / WS-55907 /WS-65807 / WS-65857 / WS-65907 / WS-73907

CABINET DISASSEMBLY (FRONT VIEW)

WS-55807 / WS-65807

*Refer to the Parts List for Part Numbers

1b. Front Cabinet Disassembly

1. Remove the Speaker Grille by pulling forward.

2. Remove the Board Front by removing 4 screws (a).

3. Remove the 5 screws (b) holding the Screen Assembly.

4. Lift the Screen Assembly up and away from the cabinet.

Page 8

MODELS: WT-46807 / WS-55807 / WS-55857 / WS-55907 /WS-65807 / WS-65857 / WS-65907 / WS-73907

CABINET DISASSEMBLY (FRONT VIEW)

WS-55857 / WS-65857

*Refer to the Parts List for Part Numbers

1c. Front Cabinet Disassembly

1. Remove the Speaker Grille by pulling forward.

2. Remove 2 screws (a) to remove the Control Panel.

3. Remove the Board Front by removing 4 screws (b).

4. Remove the 4 screws (c) holding the Screen Assembly.

5. Lift the Screen Assembly up and away from the cabinet.

Page 9

MODELS: WT-46807 / WS-55807 / WS-55857 / WS-55907 /WS-65807 / WS-65857 / WS-65907 / WS-73907

CABINET DISASSEMBLY (FRONT VIEW)

WS-55907 / WS-65907 / WS-73907

*Refer to the Parts List for Part Numbers

1d. Front Cabinet Disassembly

1. Remove the Cover Front, the two Speaker Grilles and Cover Control by pulling forward.

2. Remove 2 screws (a) to remove the Control Panel.

3. Remove the Board Front by removing 4 screws (b).

4. Remove the 4 screws (c) holding the Screen Assembly.

5. Lift the Screen Assembly up and away from the cabinet.

Page 10

MODELS: WT-46807 / WS-55807 / WS-55857 / WS-55907 /WS-65807 / WS-65857 / WS-65907 / WS-73907

CABINET DISASSEMBLY (REAR VIEW)

WT-46807

*Refer to the Parts List for Part Numbers

2a. Rear Cabinet Disassembly

1. Remove 15 screws (a) holding the Back Board.

2. Remove the 13 screws (b) holding the Back Cover.

3. Remove the 3 screws (d) securing each Board Shelf.

3. Remove the 4 screws (c) securing the Light Box Assembly.

4. Slide the Light Box out the rear of the Cabinet.

Page 11

MODELS: WT-46807 / WS-55807 / WS-55857 / WS-55907 /WS-65807 / WS-65857 / WS-65907 / WS-73907

CABINET DISASSEMBLY (REAR VIEW)

WS-55807 / WS-55857 / WS-55907 / WS-65807 / WS-65857 / WS-65907 / WS-73907

*Refer to the Parts List for Part Numbers

2b. Rear Cabinet Disassembly

1. Remove 12 screws (a) holding the Back Board.

2. Remove the 4 screws (c) holding each Board Shelf.

3. Remove the 4 screws (b) securing the Light Box Assembly.

4. Slide the Light Box out the rear of the Cabinet.

Page 12

MODELS: WT-46807 / WS-55807 / WS-55857 / WS-55907 /WS-65807 / WS-65857 / WS-65907 / WS-73907

CABINET SEPARATION PROCEDURE

MODELS: WS-65807, WS-65857, WS-65907, WS-73907

The cabinets for the above models are assembled in two pieces. The two pieces may be separated to allow easier
delivery and setup. The following instructions show how to safely separate and re-attach the cabinets.

Note:

1) Remove the lower screw from each side of the TV back. On both sides, pull off the two plastic caps, and
remove the two exposed screws.

2) Lift the cabinet top straight up until the guide pins clear the holes in the bottom cabinet. DO NOT use the
screen frame when lifting the cabinet top.

3) Carefully place the cabinet top onto the floor.

4) When reassembling, set the cabinet top on the bottom. Be sure the guide pins align with the holes in the
cabinet bottom. Keep your fingers clear of the edges being joined. Replace the caps and screws that
were removed in step 1.

Step 1

The guide pins under the cabinet top are prone to breakage if mishandled. Be sure to keep the
cabinet top straight when removing, setting down and re-installing, being careful not to tilt back­ward or forward on the guide pins.

Step 2

Page 13

Step 4Step 3

MODELS: WT-46807 / WS-55807 / WS-55857 / WS-55907 /WS-65807 / WS-65857 / WS-65907 / WS-73907

SERVICING THE LENTICULAR SCREEN AND FRESNEL LENS

CAUTION: Wear gloves when handling the Lenticular Screen and Fresnel Lens.

This prevents cuts and finger prints. Do not place Fresnel Lens in the sun.
This may cause fire and heat related injuries.

WS-55807 / WS-65807
1a. Lenticular Screen and Fresnel Lens Removal

1. Remove the screen assembly as shown in the Cabinet Disassembly procedure.

2. Remove the screws (a) securing the Screen Holder.

3. Slide the Lenticular Screen and Fesnel Lens from the Screen Frame.

Note: When separating the Lenticular Screen from the Fresnel Lens, use caution

while prying the Screen and Lens apart. Use a slot type screw drive, and
remove the pressure sensitive double sided tape.

Page 14

MODELS: WT-46807 / WS-55807 / WS-55857 / WS-55907 /WS-65807 / WS-65857 / WS-65907 / WS-73907

SERVICING THE LENTICULAR SCREEN AND FRESNEL LENS

CAUTION: Wear gloves when handling the Lenticular Screen and Fresnel Lens.

This prevents cuts and finger prints. Do not place Fresnel Lens in the sun.
This may cause fire and heat related injuries.

WS-55857 / WS-65857 / WS-55907 / WS-65907 / WS-73907 / WT-46807
1a. Lenticular Screen and Fresnel Lens Removal

1. Remove the screen assembly as shown in the Cabinet Disassembly procedure.

2. Remove the Screen Frame top section by removing 4 screws (a).

3. Carefully grasp the Lenticular Screen and Fresnel Lens combination and pull upward and out
of the Screen Frame Assembly.

Note: When separating the Lenticular Screen from the Fresnel Lens, use caution

while prying the Screen and Lens apart. Use a slot type screw drive, and
remove the pressure sensitive double sided tape.

Page 15

MODELS: WT-46807 / WS-55807 / WS-55857 / WS-55907 /WS-65807 / WS-65857 / WS-65907 / WS-73907

g

SERVICING THE LENTICULAR SCREEN AND FRESNEL LENS

2. Lenticular Screen and Fresnel Lens Installation.

Note: Store the Lenticular Screen and Fresnel Lens in a cool dry place. High humidity may

deform the Lenticular Screen and Fresnel Lens.

1. Apply double coated tape (Part # LENS-TAPE) along the top front edge of the Fresnel Lens
as shown below. Refer to the Table below for proper tape length.

2. Place the Fresnel Lens on top of the Lenticular Screen and apply pressure at the top edge
to bond them together as shown below.

Model

WT-46807 46" 40"
WS-55807 55" 47.8"
WS-55857 55" 47.8"
WS-65807 65" 56.5"
WS-65857 65" 56.5"
WS-65907 65" 56.5"
WS-73907 73" 63.5"

Screen

Size

Page 16

Tape

Len

th

MODELS: WT-46807 / WS-55807 / WS-55857 / WS-55907 /WS-65807 / WS-65857 / WS-65907 / WS-73907

SERVICING THE DIAMONDSHIELD™

1. DiamondShield™ Removal Procedure

The location of the DiamondShieldTM molding clips varies between models, top and bottom, or sides. Use
the appropriate disassembly procedure given below.

Note:

Wear gloves when handling the DiamondShield™ to prevent finger prints.

Top & Bottom Molding Clips

1. Gently insert a small screwdriver between the
DiamondShield™ and one end of the clip to
pry the clip loose.

Side Molding Clips

1. Gently insert a small screwdriver between the
DiamondShield™ and one end of the clip to
pry the clip loose.

2. Remove both clips by pulling them toward you.

3. Carefully insert a small screwdriver into the
gap at the top/center point of the Shield and
pull the Shield slightly away from the unit.
Place your hands at the points shown and
gently bow the Shield toward you and remove
from the unit. Then re-install the two clips.

2. DiamondShield™ Installation Procedure

*(See the Parts List for DiamondShield™ part numbers)

To install the DiamondShieldTM, reverse the above Removal Procedure.

2. Remove both clips by pulling them toward you.

3. Carefully insert a small screwdriver into the
gap at the side/center point of the Shield and
pull the Shield slightly away from the unit.
Place your hands at the points shown and
gently bow the Shield toward you and remove
from the unit. Then re-install the two clips.

Page 17

MODELS: WT-46807 / WS-55807 / WS-55857 / WS-55907 /WS-65807 / WS-65857 / WS-65907 / WS-73907

PCB Locations and Chassis Removal

Chassis Removal

1) Remove the 3 screws “a”
securing the rear of the
chassis.

2) Pull up slightly of the 2
front chassis locks “b”.

3) Disconnect all intercon­necting cables.

4) Carefully slide the
chassis out the rear of
the cabinet.

Main Component Locations

Page 18

MODELS: WT-46807 / WS-55807 / WS-55857 / WS-55907 /WS-65807 / WS-65857 / WS-65907 / WS-73907

CRT REPLACEMENT

1. Removal of the CRT

Caution! High voltage should be completely discharged prior to CRT removal.

Since The CRTs receive high voltage from the HV Block, discharge
by shorting the open end of the respective high voltage cable to
chassis ground.

Note: Refer to the Cabinet Disassembly Procedures when performing steps 1 through 4.

1. Remove the Speaker Grille, Front Board, and Screen Assy.

2. Remove the Back Board.

3. Remove the Anode Lead Wire from the CR Block.

4. Remove the PCB-CRT.

5. Remove 4 hex-screws "a" retaining the Optical Unit. [Figure 5-1]

6. Remove 4 screws "b" retaining the Lens.

Note: DO NOT loosen the RED screws. Doing so will break the seal between the

C-Element and the # 6 Lens, causing leakage of the CRT Coolant.

7. Remove 4 screws "c" retaining the CRT. [Figure 5-2]

8. Remove the Deflection Yoke from the neck of the CRT. [Figure 5-7]

Figure 5-1

Figure 5-2

Note: The 4 spring-loaded screws shown

in Fig 5-2 and labeled as "DO NOT
REMOVE", should not be loosened
under any circumstance. Doing so
will break the seal between the
CRT and the CRT-Spacer, causing
leakage of the CRT Coolant.

Page 19

MODELS: WT-46807 / WS-55807 / WS-55857 / WS-55907 /WS-65807 / WS-65857 / WS-65907 / WS-73907

2. Installation of the CRT

Note: The replacement CRT is supplied as an assembly comprised of the CRT and the

Inner Lens with the space between them filled with ethylene glycol. Care should
be taken during handling and installation to prevent shock from disrupting the seal
or alignment between the CRT and Inner Lens. [Figure 5-3]

Figure 5-3

Note: The CRT fixing screws should not be loosened nor should they be removed. [Figure 5-4]

Figure 5-4

1. Carefully position the replacement CRT and fasten in place using 4 screws "d". [Figure 5-6]

Figure 5-6

Figure 5-5

Page 20

MODELS: WT-46807 / WS-55807 / WS-55857 / WS-55907 /WS-65807 / WS-65857 / WS-65907 / WS-73907

2. Install the Deflection Yoke on the CRT neck. [Figure 5-7]

3. Install the Lens that was removed in steps 8 and 9 of Removal Of The CRT. [ Figures 5-1 and 5-2 ]
a) Position the Lens so that the Label faces the direction shown in Figure 5-8.
b) Install the mounting screws. [Figure 5-1]

4. Connect the PCB-CRT.

5. Insert the Optical Unit into the Light Box Assembly.

6. Insert the Anode Lead Wire into the Flyback Transformer.

7. Re-clamp the Lead Wire in its original position.

Figure 5-7

Figure 5-8

Adjustment procedures after replacing the CRT(s)

• CRT Cut Off / White Balance Adjustment

• Static Convergence Adjustment

• Dynamic Convergence Adjustment

Page 21

MODELS: WT-46807 / WS-55807 / WS-55857 / WS-55907 /WS-65807 / WS-65857 / WS-65907 / WS-73907

ELECTRICAL ADJUSTMENTS

Note: Perform only the adjustments required.

Do not attempt an alignment if proper equipment is not available.

1. Test Equipment

• Oscilloscope (Unless otherwise specified, use 10:1 probes)

• Signal Generator (both SD and HD capable)

• Frequency Counter

• Direct Current Voltmeter

• Direct Current Power Supply

• Multiplex Audio Signal Generator

• Direct Current Ampere Meter

2. Test Signals

A. Monoscope Signal

When called for, use the NTSC or HD 1080i
monoscope signal shown.

B. Color Bar Signal

Use the color bar signal shown
below, unless otherwise specified
in this manual.

100%

40%

40%

Split-Field Color Bars (100% window)

Monoscope Signal

75%

1H

3. Initial Setup

A. Option Menu Setup

Follow the steps below for the initial set-up:

1. Select the "MENU" display by pressing the "MENU" button once.

2. Press the number buttons "8", "2", "7", "0" in sequence to
select the "OPTION MENU" display.

3. Press the "ADJUST" button to select "INITIAL."

4. Press "ENTER."

NOTE: At this time channel 3 is automatically selected.

Page 22

(MENU-8-2-7-0)

OPTION MENU

Initial
Power restore :OFF
DTV Port :Auto

MODELS: WT-46807 / WS-55807 / WS-55857 / WS-55907 /WS-65807 / WS-65857 / WS-65907 / WS-73907

(By

)

B. Default Settings

MAIN MENU DEFAULT SETTINGS

SETUP

Memorize Channels ANT A
Language English

CLOCK

Clock Setting Auto
Time Zone Eastern
Daylight Savings Applies
Clock Time N/A
Set Day N/A

AV CONNECTION

AV Network OFF
External Audio System NO
AV Receiver at Input 1 None
Audio Output Variable

INPUT ASSIGNMENT

Antenna A On
Antenna B On
DTV YPrPb
Input 1 Input-1
Input 2 Input-2
Input 3 Input-3
Input 4 Input-4
Component 1 Comp. 1
component 2 Comp. 2

CAPTIONS

Closed Captions With Mute
CC Background Gray

Input ANT A
Channel 3
Memory Deleted
Name N/A
SQV N/A

Timer Off
Set Time 12:00PM
Set Day Everyday
Input ANT A
Channel 3

TV Rating Off
FV-Fantasy Violence N/A
D-Sexual Dialog N/A
L-Adult Language N/A
S-Sexual Situation N/A
V-Violence N/A
Program not Rated N/A
Movie Rating N/A

V-Chip Start Time N/A
V-Chip Stop Time N/A
Lock by Time Off
Lock Time N/A
Unlock Time N/A

CHANNEL EDIT

TIMER

V-CHIP PARENT LOCK

V-CHIP LOCK BY TIME

ADVANCED FEATURES

SD Video Format 480P
Video Mute On
Black Lev el Expansion On

AUDIO SETTINGS

Volume 30%
Bass 50%
Treble 50%
Balance 50%
Surround Off
Listen to Stereo

Level Sound Off

VIDEO SETTINGS

Iris Off
Contrast 100%
Brightness 50%
Sharpness 50%
Color 50%
Tint 50%
Color Temp. High
Video Noise Reduction

PIP/POP

Source Ant A Ch 3
PIP Position Lower Right
POP Position Right Half
Format Standard
PIP/POP Format Dble. Window

A/V RESET DEFAULT SETTINGS

A/V Memory ANT-A/B DTV INPUTS 1-4 DVD-1/2

Iris
Contrast Max. Max. Max. Max.
Brightness Center Center Center Center
Auto Picture
Sharpness Center Center Center Center
Color Center Center Center Center
Tint Center Center Center Center
Color Temp. High High High High
Video Noise Normal Normal Normal Normal
Bass Center Center Center Center
Treble Center Center Center Center
Balance
Surround OFF OFF OFF OFF
Listen To
Level Sound OFF OFF OFF OFF

OFF

OFF

Center

Stereo

Input

C. A/V Memory

Each of the external inputs has its’ own Audio/Video Memory. A change in an A/V setting at a specific input

is stored in memory for that specific input.

A/V Reset

1. The front panel AV Reset button intializes all A/V Memories.

2. The AV Reset in the user’s menu initializes only the selected input’s A/V Memory.

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